Assessment of the two-phase flow models in the CUPID code using the downcomer boiling experiment

作者：Cho Hyoung Kyu; Yun Byong Jo; Yoon Han Young; Jeong Jae Jun^*

来源：Journal of Nuclear Science and Technology, 2012, 49(1-2): 78-89.

DOI：10.1080/18811248.2011.636560

• two-phase flow
• numerical simulation
• downcomer boiling
• CUPID
• DOBO

For the analysis of transient two-phase flows in nuclear reactor components, a three-dimensional thermal hydraulics code, named CUPID, has been being developed. We simulated the downcomer boiling experiment (DOBO) experiment in two-dimensions using the CUPID code to evaluate its two-phase flow models and verify its applicability to the downcomer boiling analysis. The simulation result showed that it can reproduce the important characteristics of the downcomer boiling, such as a flow pattern change from a bubbly flow to churn and mist flows and a circulation of liquid accelerated by bubbles. The two-phase flow models that require further improvement were identified as well for an enhanced prediction of the downcomer boiling.

• 出版日期2012-2